Investments and Other Marketable Securities - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Net unrealized holding gain (loss)	$ (8,536)	$ (6,875)
Net unrealized holding gains (losses), income tax (benefit) expense	(2,549)	(2,054)
Equity securities, gross realized gains	2,218	661	$ 263
Equity securities, gross realized losses	1,550	349	773
Securities owned	29,583	31,334
Cash equivalents fair value	541,635	565,588
Available for sale debt securities
Schedule of Investments [Line Items]
Available-for-sale securities, gross realized gains	475
Available-for-sale securities, gross realized losses		215	602
Investment funds sponsored by LSV
Schedule of Investments [Line Items]
Investment funds sponsored by LSV	8,129	7,316
Gains (losses) from the change in fair value of the funds	$ 813	$ 950	$ (550)